From: DRC <information@libjpeg-turbo.org>
Date: Fri, 1 Sep 2017 14:01:00 +0000 (-0500)
Subject: Build: Fix AltiVec detection on OS X Leopard
X-Git-Tag: 1.5.3~25
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4ded4dfac630c012c7985a5ed136c5f5eb3502ee;p=libjpeg-turbo

Build: Fix AltiVec detection on OS X Leopard

The ability to directly access elements of an AltiVec vector is
apparently a more recent thing.
---

diff --git a/acinclude.m4 b/acinclude.m4
index eb44007..113169f 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -263,7 +263,9 @@ AC_DEFUN([AC_CHECK_ALTIVEC],[
     #include <altivec.h>
     int main(void) {
       __vector int vi = { 0, 0, 0, 0 };
-      return vi[0];
+      int i[4];
+      vec_st(vi, 0, i);
+      return i[0];
     }]])], ac_has_altivec=yes)
   CFLAGS="$ac_save_CFLAGS"
   if test "x$ac_has_altivec" = "xyes" ; then